6.45 Is exposure to a chemical in Teflon-coated cookware haz- ardous? Perfluorooctanoic acid (PFOA) is a chemical used in Teflon®-coated cookware to prevent food from stick- ing. The Environmental Protection Agency is investigat- ing the potential risk of PFOA as a cancer-causing agent (Science News Online, Aug. 27, 2005). It is known that the blood concentration of PFOA in the general population has a mean of μ = 6 parts per billion (ppb) and a standard deviation of σ = 10 ppb. Science News Online reported on tests for PFOA exposure conducted on a sample of 326 people who live near DuPont's Teflon-making Washington (West Virginia) Works facility. a. What is the probability that the average blood con- centration of PFOA in the sample is greater than 7.5 ppb? b. The actual study resulted in x = 300 ppb. Use this in- formation to make an inference about the true mean (u) PFOA concentration for the population that lives near DuPont's Teflon facility.

6.45 Is exposure to a chemical in Teflon-coated cookware haz- ardous? Perfluorooctanoic acid (PFOA) is a chemical used in Teflon®-coated cookware to prevent food from stick- ing. The Environmental Protection Agency is investigat- ing the potential risk of PFOA as a cancer-causing agent (Science News Online, Aug. 27, 2005). It is known that the blood concentration of PFOA in the general population has a mean of μ = 6 parts per billion (ppb) and a standard deviation of σ = 10 ppb. Science News Online reported on tests for PFOA exposure conducted on a sample of 326 people who live near DuPont's Teflon-making Washington (West Virginia) Works facility. a. What is the probability that the average blood con- centration of PFOA in the sample is greater than 7.5 ppb? b. The actual study resulted in x = 300 ppb. Use this in- formation to make an inference about the true mean (u) PFOA concentration for the population that lives near DuPont's Teflon facility.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 2CYU

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